Steel structure steel beam processing

Steel Structure Fabrication Process 
Xingyuan Yi strictly adheres to standardized steel structure fabrication procedures, ensuring precision and controllability at every stage and reliable quality: 
Design drawing confirmation → Raw material procurement → Initial steel straightening → Computer-aided layout → CNC precision cutting → Component assembly and welding → Straightening and drilling → Comprehensive quality inspection

In the overall construction of steel‑structure buildings, we adhere to a complete manufacturing and installation chain: 
Steel component fabrication → Steel structure fabrication → On-site steel structure installation

I. Material Selection

Procure raw materials, including steel, connectors, and coatings, in strict accordance with the design drawings and the owner’s requirements, ensuring that their grades, specifications, and performance characteristics all comply with the applicable standards.

II. Layout

According to the construction drawings, perform 1:1 full-scale layout of all components or prepare detailed cutting diagrams.

Prior to layout, operators must thoroughly familiarize themselves with the construction drawings and process requirements, and verify the geometric dimensions and connection details among components. If any errors are detected in the drawings or changes are required, written approval from the original design firm must be obtained; unauthorized modifications are strictly prohibited. 
The steel tape used for setting out must be verified and certified by a legally authorized metrological institution and calibrated against the tapes employed by the relevant parties. Dimensional measurements shall be taken using the segment‑by‑segment superposition method; cumulative measurement of individual segments is prohibited. 
Layout must be performed on a dedicated, level workbench. Components shall be laid out at a 1:1 scale; if a component is excessively large, a cutting layout may be prepared instead. 
The template rods and template substrates must be straight and have been corrected for any bending or deformation prior to use. 
When fabricating template rods and templates, clearly mark machining symbols, datum lines, and hole center marks, and allow for machining allowances as specified by the process. Subsequently, apply punch‑out identification tags and use magnetic paint to indicate the project number, component number, specifications, hole diameter, quantity, and other relevant information. 
Upon completion of layout, the operator shall perform a self‑inspection and, upon confirming accuracy, submit the work to the designated inspector for re‑verification. 
Qualified template rods and templates shall be stored in accordance with part number and specification, and kept under proper storage conditions. 
III. Layout and Marking

After the layout inspection has been approved, perform marking according to the geometric dimensions, while appropriately allowing for machining allowances and weld shrinkage, and ensure clear labeling and documentation.

Before marking out, operators shall thoroughly understand all symbols and markings on the layout rod and templates (or cutting diagrams), and verify the material grade, dimensions, and heat batch number. If no cutting plan is provided, operators shall independently develop a cutting schedule to maximize material utilization. 
During marking, verify the material specifications and inspect the surface quality. If any discrepancies are detected, immediately report to the Quality and Technical Departments; if the material is bent or its flatness exceeds allowable tolerances, it must be straightened before marking can proceed. 
Defective sections, such as skewed profile ends or warped sheet edges, shall be cut off or corrected prior to marking. 
Depending on the subsequent cutting (sawing, shearing) and machining (planing, milling) methods, appropriate allowances for cutting, machining, and weld shrinkage shall be provided. 
When raw material lengths or widths are insufficient and splicing is required, the splice location must be clearly marked with a part number and the groove configuration. For spliced components with holes, hole‑making shall be performed only after welding and straightening have been completed.